BQ27742EVM

User's Guide SLUUAX8 – March 2014 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module This evaluation module (EVM) is a complete evaluation system for the bq27742-G1 fuel gauge. The EVM includes one bq27742 circuit module, a current sense resistor, two thermistors, and two protection NFETs. An EV2400 PC interface board and a PC USB cable are required for fuel gauge interface, but must be ordered separately. The circuit module includes one bq27742 integrated circuit and all other onboard components necessary to monitor and predict capacity for a pack-side fuel gauge solution and to perform the protection. The circuit module connects directly across the battery cell. With the EV2400 interface board and software, the user can read the bq27742 data registers, program the chipset for different pack configurations, log cycling data for further evaluation, and evaluate the overall functionality of the bq27742 solution under different charge and discharge conditions. The latest Windows™-based PC software can be downloaded from the product folder on the Texas Instruments Web site. 1 2 3 4 5 6 7 8 9 10 11 12 Contents Features ....................................................................................................................... 2 bq27742-Based Circuit Module ............................................................................................ 2 Circuit Module Physical Layouts, Bill of Materials, and Schematic ................................................... 3 EVM Hardware and Software Setup ...................................................................................... 8 Troubleshooting Unexpected Dialog Boxes .............................................................................. 8 Hardware Connection ....................................................................................................... 9 Operation .................................................................................................................... 11 Calibrate Screen ............................................................................................................ 14 Firmware Screen ........................................................................................................... 16 Send HDQ Screen ......................................................................................................... 17 Related Documentation From Texas Instruments ..................................................................... 17 Revision History ............................................................................................................ 17 List of Figures 1 bq27742EVM Layout, Silk Screen ......................................................................................... 3 2 Top Assembly ................................................................................................................ 4 3 Top Layer ..................................................................................................................... 4 4 Bottom Layer ................................................................................................................. 4 5 Schematic ..................................................................................................................... 7 6 bq27742 Circuit Module Connection to Cell and System Load/Charger ............................................. 9 7 Battery Management Studio Screen ..................................................................................... 11 8 DataMemory Screen ....................................................................................................... 12 9 Calibration Screen.......................................................................................................... 14 10 Firmware Screen ........................................................................................................... 16 List of Tables ........................................................................................................ 1 Ordering Information 2 Bill of Materials ............................................................................................................... 5 3 Performance Specification Summary 4 5 2 ..................................................................................... 8 Circuit Module to EV2300 Connections – I2C........................................................................... 10 Circuit Module to EV2300 Connections – HDQ ........................................................................ 10 SLUUAX8 – March 2014 Submit Documentation Feedback bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 1 Features 1 Features • • • • • 1.1 www.ti.com Complete evaluation system for the bq27742 fuel gauge with Impedance Track™ Technology Populated circuit module for quick setup Personal computer (PC) software and interface board for easy evaluation Software that allows data logging for system analysis Ability to upgrade to the latest firmware version by flash reprogramming Kit Contents • bq27742 circuit module This EVM is used for the evaluation of different bq27742-based products. Please ensure that you visit the product Web folder at http://www.ti.com to download the latest firmware version, evaluation software, and documentation for the associated product to be evaluated. 1.2 Ordering Information Table 1. Ordering Information 2 EVM Part Number Chemistry Configuration Capacity bq27742EVM Li-Ion 1 cell Any bq27742-Based Circuit Module The bq27742-based circuit module is a complete and compact example solution of a bq27742 circuit for battery management. The circuit module incorporates a bq27742 battery fuel gauge IC, dual N-FETs for high-side protection, and all other components necessary to protect and accurately predict the capacity of a 1-series Li-ion cell. 2.1 Circuit Module Connections Contacts on the circuit module provide the following connections: • Direct connection to the battery cell (TB1 or TP1/TP2): CELL+ and CELL– • Connect a charger power to TB2: PACK+ and PACK–, or short the PACK+ and CELL+ to wake up the gauge, then remove the connection of PACK+ and CELL+ or the charger • To the serial communications port: SDA, SCL, and VSS (J10) or HDQ and VSS (J8) • The system load and charger connect across charger and load (TB2 or TP9/TP10): PACK–/LOAD– and PACK+/LOAD+. Impedance Track is a trademark of Texas Instruments. Windows is a trademark of Microsoft Corporation. Microsoft is a registered trademark of Microsoft Corporation. 2 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUAX8 – March 2014 Submit Documentation Feedback bq27742-Based Circuit Module www.ti.com 2.2 Pin Descriptions Pin Name PACK+ PACK– CELL+ CELL– TERM SDA SCL HDQ VSS 3 Description Pack positive terminal Pack negative terminal Cell positive terminal Cell negative terminal Thermistor input that leads to IC TS pin I2C communication data line I2C communication clock line Single-wire communication line Signal return for communication line Circuit Module Physical Layouts, Bill of Materials, and Schematic This section contains the printed-circuit board (PCB) layout, bill of materials, assembly drawings, and schematic for the bq27742 circuit module. 3.1 Board Layout This section shows the printed-circuit board (PCB) layers (Figure 1 through Figure 4), assembly drawing, and schematic for the bq27742 module. RT2 C5 R3 RT1 HDQ J11 Q3 TB2 HDQ Q1 THERM R2 J6 FET BYPASS PACK+/ LOAD+ Q4 J13 J12 TP9 TP10 J5 LOAD- DSG TP7 CHG TP3 VPWR C1 C7 R1 TP4 U1C3 RA0 TP5 Q2 TP11 BAT C2 R13 R5 R11 C6 TS C8 TP8 J15 VSS R14R15 C4 R6 R7 D2 J14 J7 VSS SCL SDA TP6 REG25 D1 Ext. CELL + PWR628 Rev. A bq27742EVM VSS Ext. CELL+ CELLTEXAS INSTRUMENTS J10 R9 1 CELLTP1 R8 R10 R4 AUX TEMP 1 TB1 HDQ PULLUP INT. 1.8V Pull up 1 CELL+ TP2 J8 J2 J3 R18 J9 1 J4 J1 PACK-/ LOADPACK-/ Figure 1. bq27742EVM Layout, Silk Screen SLUUAX8 – March 2014 Submit Documentation Feedback bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 3 Circuit Module Physical Layouts, Bill of Materials, and Schematic www.ti.com Figure 2. Top Assembly Figure 3. Top Layer Figure 4. Bottom Layer 4 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUAX8 – March 2014 Submit Documentation Feedback Circuit Module Physical Layouts, Bill of Materials, and Schematic www.ti.com 3.2 Bill of Materials and Schematic Table 2. Bill of Materials Count Reference Designator Value 6 C1, C2, C5, C6, C7, C8 0.1 µF 1 C3 1 µF 1 C4 2 Description Size Part Number MFR Capacitor, Ceramic, 10 V, X5R, 10% 0402 GRM155R61A104KA01D Murata Capacitor, Ceramic, 6.3 V, X5R, 10% 0402 GRM155R60J105KE19D Murata 0.47 µF Capacitor, Ceramic, 0.47 µF, 6.3 V, X5R, 10% 0402 GRM155R60J474KE19D Murata D1, D2 AZ23C5V6-7 Diode, Dual, Zener, 5.6 V, 300 mW SOT23 AZ23C5V6-7-F Diodes 1 J1 ED555/2DS Terminal Block, 2-pin, 6-A, 3.5 mm 0.27 x 0.25 inch ED555/2DS OST 9 J2, J3, J4, J6, J11, J12, J13, J14, J15 PEC03SAAN Header, Male 3-pin, 100mil 0.100 inch x spacing 3 PEC03SAAN Sullins 3 J5, J7, J9 PEC02SAAN Header, Male 2-pin, 100mil 0.100 inch x spacing 2 PEC02SAAN Sullins 2 J8, J10 22-05-3041 1 Q1 0 Q2, Q3, Q4 2 1 Header, Friction Lock Ass'y, 4-pin Right Angle 0.400 x 0.500 22-05-3041 Molex UPA2375T1P-E1A MOSFET, Dual N-Channel NexFET, 12 V 3.2 A WSCP UPA2375T1P-E1-A Renesas Electronics America DNP MOSFET, Dual N-Channel NexFET, 12 V 3.2 A WSCP UPA2375T1P-E1-A Renesas Electronics America R1, R3 200 Ω Resistor, Chip, 1/16-W, 5% 0402 CRCW0402200RJNED Vishay Dale R12 4.7 kΩ Resistor, Chip, 1/16-W, 5% 0402 CRCW04024K70JNED Vishay Dale 1 R13 2 kΩ Resistor, Chip, 1/16-W, 5% 0402 CRCW04022K00JNED Vishay Dale 2 R14, R15 10 kΩ Resistor, Chip, 1/16-W, 5% 0402 CRCW040210K0JNED Vishay Dale 2 R16, R17 10 Ω Resistor, Chip, 1/16-W, 5% 0402 CRCW040210R0JNED Vishay Dale 1 R2 5 mΩ Res, Metal Current sense, 1W, ±1%, 50 ppm 1632 MCS1632R005FER Ohmite 6 R4, R6, R7, R8, R9 R10 100 Ω Resistor, Chip, 1/16-W, 5% 0402 CRCW0402100RJNED Vishay Dale 2 R5, R11 1 kΩ Resistor, Chip, 1/16-W, 5% 0402 CRCW04021K00JNED Vishay Dale 2 RT1, RT2 10 kΩ Thermistor, 10 kΩ 0.095 x 0.150 inch 103AT-2 Semitec 1 TB1 ED1515 Terminal Block, 3-pin, 6-A, 3.5 mm 0.41 x 0.25 inch ED555/3DS OST 1 TB2 ED555/4DS Terminal Block, 4-pin, 6-A, 3.5 mm 0.55 x 0.25 inch ED555/4DS OST 7 TP1, TP4, TP5, TP7, TP8, TP10, TP11 5001 Test Point, Black, Thru Hole Color Keyed 0.100 x 0.100 inch 5001 Keystone 4 TP2, TP3, TP6, TP9 5000 Test Point, Red, Thru Hole Color Keyed 0.100 x 0.100 inch 5000 Keystone 1 U1 bq27742YZFR-G1 IC, Single Cell Li-Ion Pack Side Fuel Gauge with Integrated Protection BGA-15 bq27742YZFR-G1 TI 1 -- PCB PWR231 Any SLUUAX8 – March 2014 Submit Documentation Feedback bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 5 Circuit Module Physical Layouts, Bill of Materials, and Schematic www.ti.com (1) These assemblies are ESD sensitive, ESD precautions should be observed. (2) These assemblies must be clean and free from flux and all contaminants. Use of no clean flux is not acceptable. (3) These assemblies must comply with workmanship standards IPC-A-610 Class 2. (4) Reference designators marked with an asterisk ('**') cannot be substituted. All other components can be substituted with equivalent manufacturer's components. 6 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUAX8 – March 2014 Submit Documentation Feedback Circuit Module Physical Layouts, Bill of Materials, and Schematic www.ti.com Figure 5. Schematic SLUUAX8 – March 2014 Submit Documentation Feedback bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 7 Circuit Module Physical Layouts, Bill of Materials, and Schematic 3.3 www.ti.com bq27742 Circuit Module Performance Specification Summary This section summarizes the performance specifications of the bq27742 circuit module. Table 3. Performance Specification Summary Specification 4 Min Typ Max Unit Input voltage Pack+ to Pack– 2.7 3.6 4.35 V Charge and discharge current 0 1 2 A EVM Hardware and Software Setup This section describes how to install the bq27742EVM PC software, and how to connect the different components of the EVM. 4.1 System Requirements The Battery Management Studio software requires Windows XP or later. Using later versions of Windows operating system can have issues with the USB driver support. The EV2300 USB drivers have been tested for Windows 98SE and Windows XP, but no assurance is made for problem-free operation with specific system configurations. The EV2300 interface board is not officially supported for 64-bit versions of Windows and typically does not work with Windows 7 or newer. The EV2400 interface board is the recommended USB-I2C interface for Windows 7 and other 64-bit versions. No driver installation is required for use of EV2400 interface board. The EV2400 interface board has built-in I2C pullups while the EV2300 interface board does not. Jumpers J7 and J9 can be removed from the bq27742EVM if the EV2400 interface board is used. 4.2 Software Installation Find the latest software version in the bq27742 tool folder on power.ti.com. Make a search by Part Number for bq27742 to access the tool folder. Currently the most recent firmware version is bq27742-G1. Use the following steps to install the bq27742 Battery Management Studio software: 1. Ensure that the EV2300 or EV2400 interface board is not connected to the personal computer (PC) through the USB cable before starting this procedure. 2. Open the archive containing the installation package, and copy its contents into a temporary directory. 3. Open the software file that was downloaded from the TI Web site. 4. Follow the instructions on screen until completing the software installation. 5. Before starting the evaluation software, connect the EV2300 or EV2400 interface board to the computer using the USB cable. 6. If the EV2300 interface board is connected, wait until system prompt New Hardware Found appears. Choose Select Location Manually, and use the Browse button to point to subdirectory TIUSBWin2KXP-1. 7. Answer Continue to the warning that drivers are not certified with Microsoft®. 8. If the EV2300 interface board is connected, after the previous installation finishes, another system prompt New Hardware Found appears. Repeat steps 1 through 5, but specify the directory as TIUSBWin2K-XP-2. 9. Answer Continue to the warning that drivers are not certified with Microsoft. Driver installation is now finished. 10. For the EV2400 interface board, the driver should be installed along with software installation. 5 Troubleshooting Unexpected Dialog Boxes The user who is downloading the files must be logged in as the administrator. The driver is not signed, so the administrator must allow installation of unsigned drivers in the operating system. If using Windows 7, install the software with administrator privileges. 8 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUAX8 – March 2014 Submit Documentation Feedback Hardware Connection www.ti.com 6 Hardware Connection Use of the bq27742EVM-001 requires three hardware components: • bq27742 circuit module • EV2300 or EV2400 PC interface board • Windows PC . 6.1 Connecting the bq27742 Circuit Module to a Battery Cell SMB I2C HDQ Figure 6 shows how to connect the bq27742 circuit module to the cell and system load/charger. USB EV2300 C1 C7 R13 R5 R11 C6 RT2 VPWR C5 R3 RT1 HDQ Q3 TB2 Load J11 Charger HDQ Q1 THERM R2 J6 FET BYPASS PACK+/ LOAD+ Q4 J13 J12 TP9 TP10 J5 LOAD- TP5 TP3 DSG TP7 CHG C2 J15 Q2 TP11 BAT R1 TP4 RA0 U1C3 TS C8 TP8 C4 R6 R7 D2 J14 VSS R14R15 VSS SCL SDA TP6 REG25 D1 Ext. CELL + CELLTP1 PWR628 Rev. A bq27742EVM CELL+ CELLTEXAS INSTRUMENTS VSS Ext. TB1 J10 J7 R9 1 Power Supply 3.6V R8 R10 R4 AUX TEMP 1 TP2 HDQ PULLUP INT. 1.8V Pull up 1 CELL+ J8 J2 J3 R18 J9 1 J4 J1 PACK-/ LOADPACK-/ bq27742 EVM Figure 6. bq27742 Circuit Module Connection to Cell and System Load/Charger 6.2 PC Interface Connection The bq27742 fuel gauge can be configured as an HDQ communication device or left in default as an I2C device. Once the bq27742 fuel gauge is configured for HDQ communication, it cannot be reverted to I2C mode. See Section 10 for information on configuring the bq27742 fuel gauge to HDQ mode. SLUUAX8 – March 2014 Submit Documentation Feedback bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 9 Hardware Connection www.ti.com The following steps configure the hardware for interfacing to the PC: 1. Connect the bq27742-based EVM to the EV2300 interface board using wire leads as shown in Table 4 and Table 5. Table 4. Circuit Module to EV2300 Connections – I2C bq27742-Based Battery (I2C Mode) EV2300 (I2C Port) SDA SDA SCL SCL VSS GND Table 5. Circuit Module to EV2300 Connections – HDQ bq27742-Based Battery (HDQ Mode) EV2300 (HDQ Port) HDQ HDQ VSS GND 2. Connect a charger to wake-up the gauge, can use a power supply between PACK+ and PACK– or short CELL+ and PACK+. After wake-up, the charger can be removed. 3. Connect the PC USB cable to the EV2300 interface board and the PC USB port. The bq27742EVM is now set up for operation. 10 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUAX8 – March 2014 Submit Documentation Feedback Operation www.ti.com 7 Operation This section details the operation of the Battery Management Studio software. 7.1 Starting the Program Run Battery Management Studio from the Start → Programs → Texas Instruments → Battery Management Studio menu sequence. The main Battery Management Studio window (see Figure 7) appears. When Battery Management Studio first starts up the Gauge Dashboard window, the Registers window, and Command window should be seen in the main window. DataMemory, chemistry, and other windows can be added to the main window by clicking on the corresponding icon in the tools panel at the top of the main window. Data should appear initially in the Gauge Dashboard, Registers, and DataMemory sections. The Refresh (single-time scan) or the Scan (continuous scan) buttons can be clicked to update the data in the Registers and DataMemory windows. Figure 7. Battery Management Studio Screen Battery Management Studio provides a logging function which logs selected Data Registers and Data Memory values last received from the bq27742 fuel gauge. To enable this function, click the DataLog icon. The DataLog window will appear below the Registers and DataMemory windows. Registers and DataMemory parameters can be added to the log by clicking on the Add Register and Add DataMemory Parameter drop-down menus in the DataLog window and then selected the desired Registers or DataMemory parameters to be added to the log. After all the desired Registers and DataMemory parameters have been added to the log, click the Play button in order to begin logging. A Stop button will replace the Play button once logging starts, the Stop button can be clicked to stop logging. The log can be saved by clicking on the Save icon and specifying a file name. The logging intervals are specified by the value in the drop down menu in the DataLog window. To change the logging intervals, click the drop down menu and choose one of the intervals provided in the menu selections that appear. Figure 7 shows the main Battery Management Studio window. Additional Flag and Status data can be viewed at the bottom of the Registers window. SLUUAX8 – March 2014 Submit Documentation Feedback bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 11 Operation www.ti.com Each window can be resized and docked in various positions within the main Battery Management Studio window. Each window can also be pulled out from the main window and allowed its own floating window. Also, the Gauge Dashboard window and all windows that are enabled in the Tools panel in the Communication and Debug sections can be set to autohide. 7.2 Setting Programmable bq27742 Options The bq27742 data flash comes configured per the default settings detailed in the bq27742 data sheet (SLUSBV9). Ensure that the settings are correctly changed to match the pack and application for the bq27742 solution being evaluated. IMPORTANT: The correct setting of these options is essential to get the best performance. The settings can be configured using the DataMemory window seen in the main Battery Management Studio window (see Figure 8). Figure 8. DataMemory Screen 12 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUAX8 – March 2014 Submit Documentation Feedback Operation www.ti.com To read all the data flash from the bq27742, click on the Refresh button in the DataMemory window. To write to a data flash location, click on the desired location, enter the data in dialog box and click “OK” or hit the Enter key. The data flash must be read before any writes are performed to avoid any incorrect data being written to the device. Reading the data after any writes is also recommended. The data-flash configuration can be saved to a file by clicking the Export button and entering a file name. A data-flash file also can be retrieved in this way by clicking the Import button. The exported file has a .gg extension and can be opened and edited with a text editor. It does not contain all of the data flash. It only contains the public volatile parameters and should not be used for production programming. The .senc, .dfi, .dffs, .bqfs, or .dmi file should be used for production as these contain the entire data flash image, including hidden static parameters such as the battery profile. The module calibration data is also stored in the bq27742 data flash. SLUUAX8 – March 2014 Submit Documentation Feedback bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 13 Calibrate Screen 8 www.ti.com Calibrate Screen To ensure proper calibration, perform the following steps. These steps may or may not be required, depending on the type of calibration being performed. Only one calibration item can be selected and calibrated at a time. 8.1 To Calibrate the bq27742 Calibrate each item one at a time in the order presented in this document. Select the types of calibration to be performed by checking the corresponding field (see Figure 9). Enter the measured values for the types selected, if necessary. Then press the “Calibrate” button. After all calibration is complete, close the Calibrate screen. Figure 9. Calibration Screen 8.2 Temperature Calibration • • • • 8.3 Voltage Calibration • • • 8.4 Select if the temperature sensor to calibrate is the internal or the external. Measure the temperature for PACK. Type the temperature value into Enter measured value. Press Calibrate Gas Gauge button. Measure the voltage across Pack+ and Pack– with a calibrated meter. Type the voltage value in mV into Enter measured value. Press Calibrate Gas Gauge button. Coulomb Counter Offset Calibration This performs the internal calibration of the coulomb counter input offset. Check the Calibrate CC Offset field and press the Calibrate Gas Gauge button. 14 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUAX8 – March 2014 Submit Documentation Feedback Calibrate Screen www.ti.com 8.5 Board Offset Calibration This performs the offset calibration for the current offset of the board. It takes approximately 35 seconds to complete. It is expected that no current is flowing through the sense resistor while performing this calibration step. Remove load and short PACK– to LOAD–. Press the “Calibrate” button. Remember to calibrate board offset after coulomb counter calibration. 8.6 Current Calibration • • • • • Connect a load to LOAD– and LOAD+ that draws approximately 1 A, or connect a current source to PACK+ and CELL+. Ensure that the Measured Current reported is negative, or else reverse the connections. Measure the current with a calibrated meter, and type the value into Enter measured Current using (–) for current in discharge direction. Check the Calibrate Current field Press the “Calibrate” button. Disconnect or stop the load current after calibration. SLUUAX8 – March 2014 Submit Documentation Feedback bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 15 Firmware Screen 9 www.ti.com Firmware Screen Firmware screen is used to save or program a complete flash image from or to the gauge. This is done using a .senc file, which contains the instruction flash image (firmware) and the data flash image (see Figure 10). The bq27742EVM may or may not be shipped with the latest firmware version (currently bq27742-G1 v1.03). Figure 10. Firmware Screen 16 bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUAX8 – March 2014 Submit Documentation Feedback Send HDQ Screen www.ti.com 10 Send HDQ Screen To configure a bq27742 fuel gauge into HDQ mode, navigate to the Send HDQ screen. It is possible that all the screen options on the left are not visible depending on screen resolution. If needed scroll within the left menu to access the Send HDQ link. Click on the "Change comm to HDQ8" button while having the bq27742 fuel gauge connected to the EV2300 interface board via I2C. Clicking on the button causes a message to appear indicating that the process is not reversible and to confirm if the actions are desired. Also, it explains what to do once the HDQ mode has been activated. Once converting the bq27742 fuel gauge into HDQ mode, it is required that you connect the HDQ terminal of the EV2300 interface board with the HDQ connector (J4) of the bq27742 EVM, then restart the EVSW, and select the "bq27742HDQR1" with the proper firmware version from the list of supported devices within the EVSW. 11 Related Documentation From Texas Instruments To obtain a copy of any of the following TI documents, call the Texas Instruments Literature Response Center at (800) 477-8924 or the Product Information Center (PIC) at (972) 644-5580. When ordering, identify this document by its title and literature number. Updated documents also can be obtained through the TI Web site at www.ti.com. 1. bq27742-G1, Single Cell Li-Ion Battery Fuel Gauge with Integrated Protection Data Sheet (SLUSBV9) 2. bq27742-G1, Pack-Side Impedance Track™ Battery Fuel Gauge With Integrated Protector and LDO User's Guide (SLUUAX8) 12 Revision History Version Date — March 2014 SLUUAX8 – March 2014 Submit Documentation Feedback Description Initial Release bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Copyright © 2014, Texas Instruments Incorporated 17 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or safety programs, please contact the TI application engineer or visit www.ti.com/esh. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. FCC Warning This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 6 V to 25 V and the output voltage range of 0 V to 16.4 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60°C. The EVM is designed to operate properly with certain components above 60°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. 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